<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        p {
            /* 字体 */
            font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
            /* 字体大小 */
            font-size: 30px;
            /* 字体粗细 */
            font-weight: bold;
            font-style: italic;
        }
    </style>
</head>

<body>
    <p>demo01</p>
    <p>demo02</p>
    <p>demo03</p>
</body>

</html>